Month: September 2022

SKIN CONCENTRATION. “In other cells, its concentration is very low because of rapid conversion to cholesterol. Cholecalciferol is more popularly known as vitamin D3 but under natural conditions it is not a nutrient.” https://lnkd.in/e5hTuW74 View in LinkedIn

SUNLIGHT AS THE SOURCE. “The food of most animals contains, at most, only traces of cholecalciferol. An adequate supply of cholecalciferol can therefore only be obtained by exposure of skin to UVB radiation from the sun.” https://lnkd.in/e5hTuW74 View in LinkedIn

VITAMIN D DEFICIENCY. “A deficiency of cholecalciferol causes a range of pathological changes, the most prominent of which is the bone disease of rickets or osteomalacia.” https://lnkd.in/e5hTuW74 View in LinkedIn

CHICKEN DEFICIENCY STUDIES. “From this pathology it was suggested that the embryos were unable to mobilise Ca from the shell and that the consequent hypocalcaemia caused muscle weakness which prevented the chicken from breaking the egg shell.” https://lnkd.in/e5hTuW74 View in LinkedIn

THIN EGG SHELL. “A study of Hypselosaurus dinosaur eggs from southern France and the Spanish Pyrenees concluded that shell thickness was abnormally thin in up to 90 % of the samples.” https://lnkd.in/e5hTuW74 View in LinkedIn

THIN SHELLS AND VITAMIN D. “By comparison with egg biology of modern birds, the thinning of the shells was attributed to abnormal hormonal control of the calcification process, as a result of environmental stress. Strangely, as a possible explanation, there was no mention of cholecalciferol deficiency which is a well-established cause of thin shells in eggs of the domestic hen.” https://lnkd.in/e5hTuW74 View in LinkedIn

SO ENDS this Fragment. Dr Fraser, in private correspondence with me revealed the following. “I suspect that few palaeontologists would browse a nutrition journal and those that I have spoken to are mystified by the idea of biological mechanisms for species extinction.” In other words, this very credible and testable hypothesis has been overlooked. https://lnkd.in/e5hTuW74 View in LinkedIn

MISPLACED CONCRETENESS. “Reality consists of a hierarchy of intertwined processes. There are very few explicitly processual theories in biology today. As a practising biologist, I’ve always found this utterly baffling and disappointing. We remain strangely fixated on explanation in terms of static unchanging entities.” (Foreword, by Johannes Jaeger). https://lnkd.in/evBZWZaE View in LinkedIn

Gorgeous ornamental daisies. View in LinkedIn

THE ORDER OF MATTER. “In CDM cosmologies structure forms hierarchically: small halos (on average) form earlier, and then larger halos form via mergers and accretion. Subhalos are reduced in mass, or destroyed, by tidal stripping as they orbit within larger halos.” (CDM = Cold Dark MatterCold dark matter). https://lnkd.in/e6ifiQMn View in LinkedIn